- #434 of 506
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Re: considering chevy [rbb39]
by jbull454GMC
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Jan 25, 2009 (5:29 pm)
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Replying to: rbb39 (Aug 10, 2008 1:41 pm)
I work for a chevy dealership. As for the 05-07 duramax no recalls, as the older models had an injector recall. The newer models seem to be doing fairly well so far as for repairs. Mileage is about 15-20 depending on driving. Stay away from the new body style 2007 and a half on up. They do not have the particulate filter which as a regeneration system that activates to burn off the soot build up. When this occurs mileage drops considerably. I have a 2008 GMC and I've been down this road with it. Good luck with your search!
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- #435 of 506
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Re: Duramax Milage [jbull454GMC]
by losman54
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Jan 25, 2009 (5:34 pm)
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Replying to: jbull454GMC (Jan 25, 2009 5:20 pm)
I agree I like the looks of the Sierra a lot better than that dumb chrome over plastic front bumper. I'm interested in knowing what kind of Amsoil oil are you using in your Duramax. I just traded my 2002 Silverado and got a new GMC Topkick and I'm getting 13-17 city/hwy not bad.
One thing that I had in my Silverado that I would recommend is a K&N air filter, it will add 10-12 HP, and as you know your will get better MPG with more HP, and colder air. It's pricey but it's the last you will have to buy! 
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- #436 of 506
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Re: Duramax Milage [losman54]
by jbull454GMC
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Jan 25, 2009 (5:44 pm)
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Replying to: losman54 (Jan 25, 2009 5:34 pm)
That bumper is what really turned me off. I will probably be using 5W40 Amsoil. It, right now, is the only one formulated for the new LMM engine. I don't know if K&N offers a filter for the LMM engine. The current filter that comes factory is made by Donaldson. Donaldson is recomended by Amsoil actually. I'm not sure I want to add any more power to that engine! It could get me in trouble as it is, and its getting quicker with break in. I will definely keep that in mind though. Thanks!
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- #437 of 506
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Re: Duramax Milage [jbull454GMC]
by losman54
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Jan 25, 2009 (5:52 pm)
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Replying to: jbull454GMC (Jan 25, 2009 5:44 pm)
you can go on to their site and enter yr/model and if they have one it will come up. THX for the info on the Amsoil...have you seen any MPG as a result of using Amsoil?
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- #438 of 506
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Re: Duramax Milage [losman54]
by jbull454GMC
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Jan 25, 2009 (6:38 pm)
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Replying to: losman54 (Jan 25, 2009 5:52 pm)
Okay, I'll give it a look. Thanks for the info there. As for my currant truck I have not put it in yet. Its not boke in. As for other trucks, which were all gas, yes. Believe this or not. I have an 86 Chevy crew cab dually, 454, 4 wheel drive. I got almost 16 miles to the gallon on a trip to North Carolina with it. It wasn't my idea to take it, that was a now ex's idea. Plus my other vehicles I have put it in have increased in mileage too. I am looking forward to see how it does in my Duramax.
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- #439 of 506
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Re: Duramax Milage [jbull454GMC]
by losman54
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Jan 25, 2009 (6:47 pm)
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Replying to: jbull454GMC (Jan 25, 2009 6:38 pm)
I will have to check but I suspect that you are not going to be able to run synthetic oil in a diesel. I'm open to comments
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- #440 of 506
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Re: Duramax Milage [losman54]
by jbull454GMC
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Jan 25, 2009 (7:00 pm)
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Replying to: losman54 (Jan 25, 2009 6:47 pm)
I'm going to do more research as well. I still plan on giving it a try. Right now I use Rotella. Everything I've heard and read its the best conventional oil on the market for a diesel. I would like to know if anyone else has any insight on synthetic oils in a duramax too. Let us know folks!
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- #441 of 506
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Re: Duramax Milage [jbull454GMC]
by losman54
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Jan 25, 2009 (7:12 pm)
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Replying to: jbull454GMC (Jan 25, 2009 7:00 pm)
I just did a quick Google search and I was pleasantly surprised to see the following:
http://www.oilsandlube.com/dieseloil21.htm
Based on what this says...I'm willing to give it try after I ask to see if it would void any warranties.
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- #442 of 506
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by losman54
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Jan 25, 2009 (7:20 pm)
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You know I must of just taken a stupid pill! I just remembered that my wife's Jetta diesel gets synthetic oil every 10K miles,,,btw...we get 48-50 MPG
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- #443 of 506
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Re: Duramax Milage [losman54]
by jbull454GMC
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Jan 25, 2009 (7:23 pm)
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Replying to: losman54 (Jan 25, 2009 7:12 pm)
That is an interesting site. Being an Amsoil preferred customer I do get literature on their tests. The wear tests are very impressive. They also have several fuel additives for diesels too. If you look further in to Amsoil look at becoming a preferred customer also. It will save you a lot in the long run. Especially if you start using it other vehicles. I was changing oil on 8 for a while. Conventional oil was costing me on that. I switched to Amsoil and their extended service oils...I saved $700.00 in oil changes alone. Plus the fuel mileage increases, but as I said before it was on gas engines. After looking at what that site says about rotella I might use a different conventional oil too.
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